package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }


        //密码比对
        // 使用MD5对密码明文进行加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */

    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        // 1.将dto的数据写入employee的对象中
        BeanUtils.copyProperties(employeeDTO, employee);
        // 2.将密码写入
        String password = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);
        // 3.将用户状态写入
        employee.setStatus(StatusConstant.DISABLE);
        // 4.将日期写入
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        // 5.将执行该行文的用户写入 可在jwt令牌验证的时候将empId传入到ThreadLocal
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        // 6.将用户传入数据库
        employeeMapper.save(employee);
    }

    /**
     * 查询员工
     * 传入的值为Dto
     * 在执行pageHelper之后会自动生成sql
     * 在service层需要返回PageResult包括总查询数以及数据
     * 在pageHepler中employeeMapper.queryEmployee(employeePageQueryDTO)的
     * 返回值必须是page<>
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult queryEmployee(EmployeePageQueryDTO employeePageQueryDTO) {
        // 1.开启分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.queryEmployee(employeePageQueryDTO);
        Long total = page.getTotal() ;
        List<Employee> records = page.getResult();
        return new PageResult(total,records);

    }



    /**
     * 更新用户状态
     * @param status
     * @param id
     */

    @Override
    public void updateStatus(Integer status, Long id) {

        Employee employee = Employee.builder()
                .status(status)
                .id(id)
//                .updateTime(LocalDateTime.now())
//                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据ID查询员工信息
     * @param id
     * @return
     */

    @Override
    public Employee SelectById(Long id) {
        Employee employee = employeeMapper.SelectById(id) ;
//        Employee employee = new Employee();
//        BeanUtils.copyProperties(employeeSelect, employee);
        employee.setPassword("*****");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */

    @Override
    public void updateForEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee() ;
        BeanUtils.copyProperties(employeeDTO, employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    /**
     * 编辑密码
     * @param passwordEditDTO
     */

    @Override
    public void EditPassword(PasswordEditDTO passwordEditDTO) {
        // 拿取要更新密码用户的ID
        Long id = BaseContext.getCurrentId();
        Employee employee = employeeMapper.SelectById(id);
        String password = employee.getPassword();
        // 将旧密码转位MD5再进行验证
        String OldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if (Objects.equals(password, OldPassword)) {
            String newPassword = passwordEditDTO.getNewPassword() ;
            newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());
            employee.setPassword(newPassword);
            employeeMapper.update(employee);
        }
    }
}
